Response: If you assign an Elastic IP address to the EC2 instance before installing OEM, then you should have no problem. Once the EC2 instance has been created (without an EIP) and OEM has been installed there is no other way to do it except to use this workaround -

Question RAID and EBS Raid 1 - Does AWS EBS provide recovery from an EBS volume since the data is automatically mirrored by AWS?

Response: It depends on whether you want control over the recovery for mirroring. Using the built in mirroring means you do not control the mirroring and therefore when recovery happens. Other options include using Oracle Standby DB/DataGuard, GoldenGate or even EBS snapshots.

Question: Striping with PIOPS - Is it necessary to stripe data when using PIOPS?

Response: It depends on how many PIOPS you are looking to achieve. Since max PIOPS is per volume is 2000 PIOPS, if you need more then 2000 PIOPS then you would need to stripe. Less than 2000 PIOPS then striping is not required.

I often get asked how long it will take to transmit a 1 TB database (assumes that the database is actually 1 TB in size and not just allocated at 1 TB). Elapsed
time is going to depend on many factors: speed of connection, compression used
(if any), can load be done in parallel etc. The fastest load times will
happen using AWS import/export (http://aws.amazon.com/importexport/
). The next fastest will be using AWS Direct Connect (http://aws.amazon.com/directconnect).
Direct Connect provides speeds of 1 Gbps to 10Gbps. Using a 1 Gbps line,
it would take about 3-4 hours (here is a good site: http://fasterdata.es.net/fasterdata-home/requirements-and-expectations/).
Assuming an internet connection speed of 100 Mbps (100Base-T
connection) it would take about a day to transfer using a traditional connection to AWS/EC2 Both DirectConnect and
Import/export provide a secure method of transfer.

Provisioned IOPS volumes are designed to deliver
within 10% of the provisioned IOPS performance 99.9% of the time. Therefore, PIOPS are very good choice when running RDBMS systems like Oracle on EC2 or RDS.